I Have a Mansion in the Post-apocalyptic World - Chapter 1552 - EaChapter Other’s Arrogance

Luo Zheng is at the bottom of the Luo Clan hierarchy, despite his family being the founders of a power refining technique that could instantly defeat any opponent.

One night, enraged by unfair treatment from a family steward, Luo Zheng burns the family records. In doing so, the hidden magic in the book engulfs him and Luo Zheng becomes a new skilled fighter. Fleeing his home and despicable clan, Luo Zheng must learn to harness his powers to rescue his younger sister while his own cousins are on his pursuit.

- Description from Novelupdates

When a cold and crafty girl travels into the body of a foolish, man-crazy, young female aristocrat, what will happen?

Xiao Shan is a famously profligate prince, the kind that makes his emperor father angry just by being seen. Xiao Shan’s greatest wish in life is to be a salted fish who lives without any worldly strife, until his father bestows upon him Xie Zhui, a ger who has been mixing with men, to be his bride. Xie Zhui took his brother’s place in the army at fourteen, achieved great merits by successfully defending against enemies outside the northern border city at sixteen, and was discovered to be a ger after being seriously injured at eighteen. After returning to the capital, the emperor pardoned Xie Zhui’s crime of deceiving the monarch and bestowed him to Xiao Shan as his rightful spouse. Everyone says that Xiao Shan has married a ger who came out of a pile of men, with a vast grassland above his head. They think about how much the emperor must dislike Xiao Shan to have given him such a troublesome marriage.

The Republic of San Magnolia.